Home / 8,539.12-12,808.56-2,990.92

Finding the Fourth Proportional to 8,539.12, 12,808.56 and 2,990.92

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Solution

The fourth proportional to 8,539.12, 12,808.56 and 2,990.92 is: 4,486.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.12 : 12,808.56 = 2,990.92 : x
  2. Step 2: Convert to fraction form
    8,539.12/12,808.56 = 2,990.92/x
  3. Step 3: Cross multiply
    8,539.12x = 12,808.56 × 2,990.92
  4. Step 4: Simplify right side
    8,539.12x = 38,309,378.28
  5. Step 5: Solve for x
    x = 38,309,378.28/8,539.12
  6. Step 6: Final answer
    x = 4,486.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.